A parallel plate capacitor after charging is kept connected to a battery and the plates are pulled apart with the help of insulating handles. Now which of the following quantities will decrease?
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(d)
$V$ remains constant
$C=\frac{A \varepsilon_0}{d} \Rightarrow d$ increases
$C$ decreases
$q=C V$
$q$ decreases $U=\frac{1}{2} C V^2$
$U$ decreases
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